/*
 * Copyright (c) 2007-2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.jaxp.validation;

import javax.xml.transform.stream.StreamSource;

import com.sun.org.apache.xerces.internal.xni.XNIException;
import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;
import com.sun.org.apache.xerces.internal.xni.parser.XMLParseException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * <p>Static utility methods for the Validation API implementation.</p>
 *
 * @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
final class Util {

    /**
     * Creates a proper {@link XMLInputSource} from a {@link StreamSource}.
     *
     * @return always return non-null valid object.
     */
    public static final XMLInputSource toXMLInputSource(StreamSource in) {
        if (in.getReader() != null)
            return new XMLInputSource(in.getPublicId(), in.getSystemId(), in.getSystemId(), in.getReader(), null);
        if (in.getInputStream() != null)
            return new XMLInputSource(in.getPublicId(), in.getSystemId(), in.getSystemId(), in.getInputStream(), null);

        return new XMLInputSource(in.getPublicId(), in.getSystemId(), in.getSystemId());
    }

    /**
     * Reconstructs {@link SAXException} from XNIException.
     */
    public static SAXException toSAXException(XNIException e) {
        if (e instanceof XMLParseException)
            return toSAXParseException((XMLParseException) e);
        if (e.getException() instanceof SAXException)
            return (SAXException) e.getException();
        return new SAXException(e.getMessage(), e.getException());
    }

    public static SAXParseException toSAXParseException(XMLParseException e) {
        if (e.getException() instanceof SAXParseException)
            return (SAXParseException) e.getException();
        return new SAXParseException(e.getMessage(), e.getPublicId(), e.getExpandedSystemId(), e.getLineNumber(), e.getColumnNumber(), e.getException());
    }

} // Util
